HP Archive Backup System for OpenVMS Guide to Operations

Media Management
4.2 Domain
4.2.15 Request ID
4.2.16 Scheduler Type
4.2.17 Scratch Time
4.2.18 SYSPRV
4.2.19 Transition Time
MDMS uses sequentially increasing request identifiers for each request received by the MDMS
database server, and this attribute displays the ID of the next request. If this ID is becoming very
large, you can reset it to zero or one (or indeed any value) if you wish. The request ID automatically
resets to one when it reaches one million.
MDMS performs scheduling operations on behalf of itself and ABS. For ABS scheduling, you
can choose a scheduler type that best meets your needs, as follows:
• Internal - The default internal scheduler type uses MDMS schedule objects and OpenVMS
batch queues. This option should be sufficient for most sites as the schedule object supports
many custom scheduling options.
• External - This option uses MDMS schedule objects and OpenVMS batch queue, but the
scheduling is submitted through a command procedure. You can use this option if you have
a need to modify the command procedure to perform site-specific operations.
• Scheduler - This option uses an external scheduler product via command procedures. ABS
supplies a template scheduler command procedure that you can modify to access your own
scheduler product. You can also use this option to invoke the pre-V3.0 ABS DECScheduler
V2.1B, as long as you have a license for that product.
MDMS-initiated scheduled operations such as MDMS$MOVE_VOLUMES always use the
internal MDMS scheduler.
The domain default scratch time is the default scratch time applied to new volumes when they
are created. Scratch time indicates how long a volume is to remain allocated (that is, how long its
data is valid and needs to be kept). You can override the domain volume scratch time when you
create, modify or allocate individual volumes. For HSM volumes, the scratch time should be set
to zero (unlimited), since HSM data remains valid until a volume is repacked.
MDMS uses user account rights as one mechanism for security within the domain. MDMS
allows you to control whether the OpenVMS privilege SYSPRV can map to the ultimate MDMS
right MDMS_ALL_RIGHTS. If you set the SYSPRV attribute, users with SYSPRV are assigned
MDMS_ALL_RIGHTS, which means they can perform any operation subject to access control
checks. Clearing SYSPRV gives users with SYSPRV no special rights.
Note
If you wish to use the SYSPRV attribute from the MDMSView GUI, the user’s authorization
file must have SYSPRV defined as a privilege and a default privilege. Having
SETPRV is not sufficient as there is no way to set the SYSPRV privilege from the GUI.
The domain default transition time is applied to volumes by default when they are deallocated
into the transition state. The transition time determines how long the volumes remain in the transition
state before moving to the free state. This attribute is used alongside the deallocation state
attribute, which determines the default state that volumes are deallocated into. You can override
the domain default transition time when you create, modify, or deallocate a volume.
4-4 Media Management